Emperor Suzong of Tang

Emperor Suzong of Tang (19 October 711-16 May 762) was Emperor of Tang China from 12 August 756 to 16 May 762, succeeding Emperor Xuanzong and preceding Emperor Daizong. He deposed his father, who was in exile in Chengdu as a result of the An Lushan Rebellion, and he then proceeded to reconquer Luoyang and Chang'an from the rebels before dying in 762.

Biography
Li Sisheng was born in 711, the son of Emperor Xuanzong of Tang. In 756 AD, during the An Lushan Rebellion, he and his father were forced to flee from the imperial capital of Chang'an as An Lushan's massive 100,000-strong army approached, and, while Xuanzong fled to Chengdu, Suzong fled northwest to Lingzhou, where he was persuaded by his advisors to usurp the throne and force his father into retirement. As An Lushan entered Chengdu, Suzong gathered forces to him and borrowed troops from the Abbasid Caliphate and the Uyghur Khaganate. In 757, after An Lushan was assassinated and succeeded by his son An Qingxu, Suzong counterattacked against the weakened Great Yan state and reconquered the twin capitals of Chang'an and Luoyang. Suzong then empowered eunuchs as top-ranking officials, with Li Fuguo dominating power at the Imperial Court. In 762, as Suzong lay dying, Li Fuguo killed the Empress in a power struggle, and it was not until Emperor Daizong of Tang succeeded Suzong as Emperor that Li Fuguo was killed.